Method of diagnosing fault by using impedance of output terminal of power supply device for environmentally-friendly vehicle
a technology of power supply device and output terminal, which is applied in the direction of power supply testing, resistance/reactance/impedence, instruments, etc., can solve the problems of increasing the output terminal of dc-dc converter and unable to start the hybrid vehicle, so as to prevent an existing erroneous repair and accurately perform the repair action
Active Publication Date: 2018-01-09
HYUNDAI MOTOR CO LTD
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Benefits of technology
The present disclosure provides a method to accurately diagnose and repair faults in a power supply device for an environmentally-friendly vehicle using impedance measurements. This method prevents the replacement of a functioning battery and ensures accurate repairs of damaged components, improving the overall efficiency and reliability of the power supply system.
Problems solved by technology
Impedance of the output terminal of the DC-DC converter may be increased by an abnormal state (damage by external force, and the like) of the cable connecting the respective elements of the power supply device or corrosion of the cable due to aging of the respective elements of the power supply device.
In the state where the charging current of the auxiliary battery is decreased so that the voltage is dropped to a normal level or lower, the auxiliary battery fails to supply a voltage appropriate to an operation voltage of each controller, so that starting of the hybrid vehicle may be impossible.
A fault diagnosis for the impedance increase is not performed, so that an erroneous repair (replacement of only the auxiliary battery) may be caused, and as a result, the auxiliary battery is discharged again.
Method used
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[0033]Hereinafter reference will now be made in detail to various embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings and described below. While the invention will be described in conjunction with exemplary embodiments, it will be understood that the present description is not intended to limit the invention to those exemplary embodiments. On the contrary, the invention is intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the invention as defined by the appended claims.
[0034]When a (+) terminal of a DC-DC converter mounted in an environmentally-friendly vehicle is connected to a terminal stand of a 12 V electric load and an auxiliary battery, and a (−) terminal is groundably connected to the DC-DC converter itself or a vehicle frame, and a general bolt, not a regulated bolt is adopted as a bolt for...
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A method of diagnosing a fault by using impedance of an output terminal of a power supply device for an environmentally-friendly vehicle is provided. The method estimates impedance of the output terminal of the power supply device and diagnoses a fault by using the estimated impedance, thereby preventing an auxiliary battery from being discharged. Whether or not the fault is generated according to the impedance when the estimated impedance exceeds a reference value is determined.
Description
CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims under 35 U.S.C. §119(a) the benefit of priority to Korean Patent Application No. 10-2014-0018803 filed on Feb. 19, 2014, the entire contents of which are incorporated herein by reference.TECHNICAL FIELD[0002]The present disclosure relates to a method of diagnosing a fault by using impedance of an output terminal of a power supply device for an environmentally-friendly vehicle. More particularly, it relates to a method of diagnosing a fault by using impedance of an output terminal of a power supply device for an environmentally-friendly vehicle, which estimates impedance of the output terminal of the power supply device and diagnoses a fault by using the estimated impedance, thereby preventing an auxiliary battery from being discharged.BACKGROUND[0003]As illustrated in FIG. 1, a power supply device for an environmentally-friendly vehicle, such as a hybrid vehicle, an electric vehicle, and a fuel cell vehicle, include...
Claims
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IPC IPC(8): G01R27/00G01R31/40G01R31/00
CPCG01R31/40G01R31/007G01R27/00G01R27/02
Inventor LEE, DONG JUNCHOI, WON KYOUNG
Owner HYUNDAI MOTOR CO LTD